By Mills PC   Litster AL   in New Zealand Veterinary Journal

ISSN:1176-0710|53|6|423-427

Taylor & Francis Ltd‎(2005)‎

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By Atwell R.B.   Litster A.L.   in Veterinary Research Communications

ISSN:0165-7380|26|4|301-308

Springer Publishing Company ‎(2002)‎

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